This part is a kind of semiconductor called D1403.

Function of this product has 2SD1403.

Manufacturers : Wing Shing

Image and pinout :

Some of the text within the PDF file :

2SD1403 GENERAL DESCRIPTION Silicon Diffused Power Transistor Highvoltage,high-speed switching npn transistors in a plastic envelope with integrated efficiency diode,primarily for use in horizontal deflection circuites of colour television receivers QUICK REFERENCE DATA SYMBOL MT-100 CONDITIONS VBE = 0V TYP VCESM VCEO IC ICM Ptot VCEsat Icsat VF tf PARAMETER Collector-emitter voltage peak value Collector-emitter voltage (open base) Collector current (DC) Collector current peak value Total power dissipation Collector-emitter saturation voltage Collector saturation current Diode forward voltage Fall time Tmb 25 IC =4.0A; IB = 1.0A f = 16KHz IF = 5.0A ICsat = 5.0A; f = 16KHz 1.6 0.4 MAX 1500 600 6 12 120 5.0 2.0 - UNIT V V A A W V A V s LIMITING VALUES PARAMETER Collector-emitter v [ ... ]

D1403 PDF Datasheet Download